Photorefractive keratectomy for compound myopic astigmatism with the MEL-70 G-Scan excimer laser.

Abstract

PURPOSE:

To assess the safety, efficacy, predictability and stability of photorefractive keratectomy in compound myopic astigmatism with a moderate and high cylinder component.

METHODS:

Photorefractive keratectomy was done in 42 eyes with compound myopic astigmatism with the spherocylindrical algorithm of the MEL-70 excimer laser, with wide ablation zones.

RESULTS:

Spherical equivalent refraction changed from -4.19 +/- 1.65D to -0.05 +/- 0.31D, refractive cylinder from -2.01 +/- 0.71D to -0.09 +/- 0.20D and mean sphere from -3.22 +/- 1.76D to -0.02 +/- 0.26D. Mean uncorrected visual acuity rose from 0.12 +/- 0.17 to 0.91 +/- 0.10. No eye lost lines of spectacle-corrected visual acuity. The safety index was 1.03 and the efficacy index 0.98. Six months from the treatment all eyes were within +/- 1D, 8.9% of eyes were within 0.50D and 44% were plano of target refraction. Refractive and topographical stability were achieved between one and three months after treatment. Transient haze was observed between one and three months after PRK.

CONCLUSIONS:

Photorefractive keratectomy with the MEL-70 excimer laser to correct myopic astigmatism was a safe and effective procedure with good stability at six months' follow-up. Refractive and visual outcome confirmed that excellent predictability can be expected.

• Authors: A M Roszkowska, S Galasso, A Meduri, M De Matteis, F M B Ferreri
• Journal: European journal of ophthalmology (Eur J Ophthalmol) 2002 Sep-Oct Vol. 12 Issue 5 Pg. 379-83 ISSN: 1120-6721 [Print] United States
• PMID: 12474919 (Publication Type: Journal Article)

Topics

• Adult
• Astigmatism (complications, physiopathology, surgery)
• Corneal Topography
• Female
• Forecasting
• Humans
• Intraocular Pressure
• Lasers, Excimer
• Male
• Myopia (complications, physiopathology, surgery)
• Photorefractive Keratectomy
• Refraction, Ocular
• Safety
• Treatment Outcome
• Visual Acuity